Perform a ClustalW2 alignment of protein sequences using the EMBL-EBIâ€™s ClustalW2 (SOAP) service (see http://www.ebi.ac.uk/Tools/webservices/services/msa/clustalw2_soap).
This workflow uses the new EBI services, which are asynchronous and require looping over the nested workflow (Status) until the workflow has finished. Many of the EBI services now work in this way, so you can use this workflow as an example of the invocation pattern and looping configuration.